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fix sqlite/postgres incompatibility in reap_monthly_active_users

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This commit is contained in:
Neil Johnson 2018-08-11 22:38:34 +01:00
parent a001038b92
commit 31fa743567
1 changed files with 27 additions and 15 deletions
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42
synapse/storage/monthly_active_users.py
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@ -64,23 +64,27 @@ class MonthlyActiveUsersStore(SQLBaseStore):
Deferred[]
"""
def _reap_users(txn):
# Purge stale users
thirty_days_ago = (
int(self._clock.time_msec()) - (1000 * 60 * 60 * 24 * 30)
)
# Purge stale users
# questionmarks is a hack to overcome sqlite not supporting
# tuples in 'WHERE IN %s'
questionmarks = '?' * len(self.reserved_users)
query_args = [thirty_days_ago]
query_args.extend(self.reserved_users)
base_sql = "DELETE FROM monthly_active_users WHERE timestamp < ?"
sql = """
DELETE FROM monthly_active_users
WHERE timestamp < ?
AND user_id NOT IN ({})
""".format(','.join(questionmarks))
# Need if/else since 'AND user_id NOT IN ({})' fails on Postgres
# when len(reserved_users) == 0. Works fine on sqlite.
if len(self.reserved_users) > 0:
# questionmarks is a hack to overcome sqlite not supporting
# tuples in 'WHERE IN %s'
questionmarks = '?' * len(self.reserved_users)
query_args.extend(self.reserved_users)
sql = base_sql + """ AND user_id NOT IN ({})""".format(
','.join(questionmarks)
)
else:
sql = base_sql
txn.execute(sql, query_args)
@ -93,16 +97,24 @@ class MonthlyActiveUsersStore(SQLBaseStore):
# negative LIMIT values. So there is no way to write it that both can
# support
query_args = [self.hs.config.max_mau_value]
query_args.extend(self.reserved_users)
sql = """
base_sql = """
DELETE FROM monthly_active_users
WHERE user_id NOT IN (
SELECT user_id FROM monthly_active_users
ORDER BY timestamp DESC
LIMIT ?
)
AND user_id NOT IN ({})
""".format(','.join(questionmarks))
"""
# Need if/else since 'AND user_id NOT IN ({})' fails on Postgres
# when len(reserved_users) == 0. Works fine on sqlite.
if len(self.reserved_users) > 0:
query_args.extend(self.reserved_users)
sql = base_sql + """ AND user_id NOT IN ({})""".format(
','.join(questionmarks)
)
else:
sql = base_sql
txn.execute(sql, query_args)
yield self.runInteraction("reap_monthly_active_users", _reap_users)